TFC-8040-XR-375 8" Hig Rejection, Low Pressure

Summary

Product Identification

FLUID SYSTEMS® TFC®- XR 8” elements are high rejection, low pressure reverse osmosis elements designed for brackish water treatment.

• Membrane Chemistry: Proprietary TFC® polyamide
• Membrane Type: TFC®-XR membrane
• Construction: Spiral wound with fiberglass outerwrap
• Applications: High rejection for brackish water treatment
• Options: Feed spacers: 28 mil (0.7 mm) or 31 mil (0.8 mm)

Specifications

Test Conditions: 2,000 mg/l NaCl solution at 325 psi (2,240 kPa) applied pressure, 15% recovery, 77°F (25°C) and pH 7.5.

Operating Limits

• Typical Operating Pressure: 225 - 450 psi (1,550 - 3,100 kPa)
• Maximum Operating Pressure: 600 psi (4,140 kPa)
• Maximum Operating Temperature: 113°F (45°C)
• Maximum Cleaning Temperature: 113°F (45°C)
• Maximum Continuous Free Chlorine: <0.1 mg/l
• Allowable pH – Continuous Operation: 4 - 11
• Allowable pH – Short Term Cleaning: 2.5 - 11
• Maximum Differential Pressure per 40” Long Element: 10 psi (69 kPa)
• Maximum Differential Pressure Per Vessel: 60 psi (414 kPa)
• Maximum Feed Turbidity: 1 NTU
• Maximum Feed SDI (15 minute test): 5

*Consult Process Technology Group for specific information.

Mechanical / Hydraulic

Nominal dimensions and weight for the 8” elements.

*Dimensions are provided for reference only and should not be interpreted as accurate specifications.

Detailed Performance and Operating Guidelines

Performance Notes

• Performance specifications are nominal values. Individual element permeate flows may vary +20% / -15% from shown values.
• Minimum chloride ion rejection is 99.2% at the stated test conditions.
• System performance should be predicted using KMS ROPRO® software.
• System operating data should be normalized and key performance parameters tracked using KMS NORMPRO® software.

Operating Limits

• Operating Pressure: Maximum operating pressure is 600 psi (4,140 kPa). Typical operating pressure for TFC®-XR systems is 225 psi (1,550 kPa) to 450 psi (3,100 kPa). Actual operating pressure depends on system flux rate, feed salinity, recovery, and temperature conditions.
• Permeate Pressure: Permeate pressure should not exceed feed-concentrate pressure by more than 5 psi (34 kPa) at any time (on-line, off-line, and during transition).
• Differential Pressure: Maximum differential pressure limits are 10 psi (69 kPa) for a 40” (1,016 mm) long element. Maximum differential pressure for a pressure vessel is 60 psi (414 kPa).
• Temperature: Maximum operating temperature is 113°F (45°C). Maximum cleaning temperature is 113°F (45°C).
• pH: Allowable range for continuous operation is pH 4-11. Allowable range for short term cleaning is pH 2.5-11. It is recommended to limit exposure of the TFC-XR membrane to the extended pH range to 4 hours, once per month.
• Turbidity and SDI: Maximum feed turbidity is 1 NTU. Maximum feed Silt Density Index (SDI) is 5.0 (15 minute test). Feedwater with turbidity greater than 0.2 NTU generally results in frequent cleanings.
• Recovery: Maximum recovery is site and application specific. Single element recovery is approximately 15%. Recovery limits should be determined using the KMS ROPRO program.

Chemical Tolerance

• Chlorine: Exposure of TFC-XR membrane to free chlorine or other oxidizing agents (e.g., permanganate, ozone, bromine, iodine) is not recommended. The TFC-XR membrane has a free chlorine tolerance of approximately 1,000 ppm-hours based on testing at 77°F (25°C), pH 8. This tolerance may be significantly reduced if catalyzing metals (e.g., iron) are present or if the pH and/or temperature are different. Sodium metabisulfite (without catalysts like cobalt) is the preferred reducing agent. TFC-XR membrane has a chloramine tolerance of approximately 60,000 ppm-hours in the absence of free chlorine based on testing at 77°F (25°C), pH 8.
• Cationic (Positively Charged) Polymers and Surfactants: TFC-XR membrane may be irreversibly fouled if exposed to cationic (positively charged) polymers or surfactants. Exposure to these chemicals during operation or cleaning is not recommended.
• Lubricants: For element loading, use only the recommended silicone lubricant (or approved equivalent), water, or glycerin to lubricate O-rings and brine seals. The use of petroleum-based lubricants or vegetable-based oils may damage the element and void the warranty.

Service and Ongoing Technical Support

KMS offers an experienced staff for optimization of existing systems and support for new applications, along with supplemental technical bulletins and a complete line of KOCHTREAT® and KOCHKLEEN® RO pretreatment and maintenance chemicals.

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Disclaimer: This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions from the original PDF datasheet. For contractual data, always refer to the specific OEM PDF revision used on your project.

Official datasheet (PDF)

PDF datasheet